I haven't even watched it all yet, but this is very interesting, so much so, I had to comment!
When you smell an overwhelming stench like that, whether it's coming from a person or in a general area, this usually means demonic spirits are present there. Wow! That should have alerted him to about face and run! I've had that happen to me. A co-worker that was so evil, I would always smell something really disgusting from her. Even though she was apparantly very, very clean, wore perfume and everything, but there's nothing that you can do to disguise that smell! It's spiritual!